Annealing-furnace.



No. 694,054. Patented Febpzs, |902.4 A F. DANNER.

ANNEALING- FUB'NACE.

(Application led Aug. 19, 1901.)

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(No Model.)

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FREDERICK DANNER, OFTARENTUM, PENNSYLVANIA.

ANNEALlNG-FURNACE.

SPECIFICATION forming part of Letters Patent No.

694,054, dated. February 25, 1902.

Application filed August 19, 1901. Serial No. 72,484. (No model.)

T0 @ZZ whom it may concern.-

Be it known that l, FREDERICK BANNER, a citizen of the United States,residing at Tarentu'm, in the county of Allegheny and State ofPennsylvania, have invented or discovered certain new and useful.Improvements in Annealing-Furnaces, of Which improvements the followingis a specification.

The invention described herein relates to certain improvements in lcersor annealing furnaces for plate-glass.

It has heretofore been customary to support the carriages or frames b vwhich the plates of glass are carried through the cooln g portions ofthe furnace upon continuous rails extending longitudinally through thefurnace, the frames or carriages being provided withwheels, which ridealong on the rails. These constructions are objectionable on account ofthe liability to twisting of the long rail by variations of heat indifferent parts, so that the glass is not uniformly supported during itsentire traverse through the furnace.

The object of the present invention is to provide a suitablecarrying-frame for the glass and means for supporting the latter duringits movement, said parts being so constructed and arranged as to avoidall liability of any distortion of any of the parts.

The invention is hereinafter more fully described and claimed.

In the accompanying drawings, forming a part of this specification,Figure l is a sectional elevation of a portion of a leer, the plane ofsection being indicated by the line l I, Fig. 3. Fig. 2 is a horizontalsection on a plane indicated by the line Il Il, Fig.3. Fig. 3 is atransverse section on a plane indicated by the line III IH, Fig. 2.Figs. 4 and 5 are detail views illustrating the glass-carrying frame.

In the practice of my invention the furnace is constructed as regardsthe preliminary heating sections or chambers l, 2, and 3 in the usual orany suitable manner, said chambers being so located and havingtheirbottoms so constructed on a common plane that the plates of glass may beshoved from one to the other in the usual manner. The tunnel 4 isarranged,-preferably, at right angles to the direction of movement ofthe glass through the A series of shafts 5 are arranged chamber 3.

any giventime.

transversely of the tunnel, their end portions being supported inbearings 6, which are pref-l erably provided with anchor plates orexten-v sions 7, embedded in the side walls of the tnnn'ehas clearlyshown in Fig. 3. On these shafts 5 are mounted supporting-wheels S,having iianges to properly guide the support-- ing-frames in theirpassage through the furnace. These supportingframes consist of rails 9,preferably similar to railroad-rails, but inverted, upon the wheels S.'lo the flanges of the rails f) are secured supporting-bars l0, saidbars being preferably ot' a T shape in cross-section and so secured tothe rails that the same portion of the bars will extend upwardly andform the bearings of the glass plate to be annealed. Thesesupporting-bars can be arranged in close proximity to each other, and

thereby afford ample supporting-surface,-I

while only small portions of such surface are in contact with anyportion of the plate of glass. The frames are designed to be connectedone to the other by any suitable form of coupling-such, for example, asthat shownconsisting of links ll and hooks l2, arranged on opposite endsof the supporting-rails 9. The Wheels may be loosely mounted upon theirshafts, in which case the frames Will be drawn through the tunnel by anysuitable pulling mechanism acting continuously or intermittently as isknown in the art, or the carrying-frames may be shifted through thetunnel by the rotation of the wheels S.

` It is characteristic of my improvement that as the supporting-shafts 5are arranged transversely of the furnacek all portions 'of each shaftWill be always subjected to the same heat or temperature, so that Vtherecan be no differences of expansion whereby a distortion thereof may becaused. The rails 9, forming the supports or foundations for the frames,are in short sections, and hence will occupy relatively short portionsor distances of the tunnel, so that they will be always subjected to anapproximately uniform heat at Even if subjected to dierences oftemperature, the rails being sohshort, an equalization of suchtemperature by' conduction will occur, thereby avoiding differr ences ofexpansion. Hence it will be readily understood by those so that theirheads will rest IOO skilled in the art that y the parts of thecarrying-frames will always adapted to turn freely carried by saidshafts, preserve a uniform relation to each other, and rail-sectionsadapted to ride upon said wheels there can be no changes or shifting ofthe and carrying-bars secured to the rails at right supporting-Wheels,whereby the frames may angles thereto, substantially as set forth.

5 he Warped or twisted as they move through In testimony whereof I havehereunto set 15 the furnace. my hand.

I claim herein as my invention FREDERICK BANNER. An annealing-furnacehaving in eombina- Witnesses: tion, a tunnel, a series of shaftsarranged HERBERT BRADLEY, :o transverselyofrhe tunnel,supporting-WheelsF. E. GAITHER.

